2021年4月13日星期二

java开发微信APP支付

直接上代码

  

String nonce_str=WXPayUtil.generateNonceStr(); //WXPayUtil微信自己有的,自己下载,这里是生成随机字符串,下载地址(下载java的里面就有):https://pay.weixin.qq.com/wiki/doc/api/native_sl.php?chapter=11_1
SortedMap<String, String> signParams = new TreeMap<String, String>();
signParams.put("appid", weChatConfig.getAppWxAppId());//app_id---需要申请
signParams.put("body",weChatConfig.getBody());//商品参数信息
signParams.put("mch_id", weChatConfig.getWxMchId());//微信商户账号--需要申请
signParams.put("nonce_str", nonce_str);//32位不重复的编号
signParams.put("notify_url", weChatConfig.getNotifyUrl());//回调页面--这个是回调接口
signParams.put("out_trade_no", orderUserId);//订单编号
BigDecimal transValue = new BigDecimal("100");
// 计算微信的总金额乘以100
BigDecimal bTotalPrice = totalPrice.multiply(transValue);
int totalFee = bTotalPrice.intValue();
signParams.put("total_fee",String.valueOf(totalFee));//支付金额 单位为分
signParams.put("trade_type", "APP"); //app支付
String sign = createSign("UTF-8", signParams);//生成签名
signParams.put("sign", sign);
signParams.remove("key");//调用统一下单无需key（商户应用密钥）
String request
String result = CommonUtil.httpsRequest(weChatConfig.getWxPayUnifiedorderUrl(), "POST", request
//返回的result成功结果取出prepay_id：
Map map = null;
try {
 map = do
} catch (JDOMException e) {
 e.printStackTrace();
} catch (IOException e) {
 e.printStackTrace();
}
String return_code=(String) map.get("return_code");
String prepay_id =null;
if (return_code.contains("SUCCESS")){
 prepay_id=(String) map.get("prepay_id");//获取到prepay_id
}
long currentTimeMillis = System.currentTimeMillis();//生成时间戳
long second = currentTimeMillis / 1000L;//（转换成秒）
String seconds = String.valueOf(second).substring(0, 10);//（截取前10位）
SortedMap<String, String> signParam = new TreeMap<String, String>();
signParam.put("appid", weChatConfig.getAppWxAppId());//app_id
signParam.put("partnerid", weChatConfig.getWxMchId());//微信商户账号
signParam.put("prepayid", prepay_id);//预付订单id
signParam.put("package", "Sign=WXPay");//默认sign=WXPay
signParam.put("noncestr", nonce_str);//自定义不重复的长度不长于32位
signParam.put("timestamp",seconds);//北京时间时间戳
String signAgain = createSign("UTF-8", signParam);//再次生成签名
signParam.put("sign", signAgain);
return ApiResult.result(signParam);


其他
//定义签名，微信根据参数字段的ASCII码值进行排序 加密签名,故使用SortMap进行参数排序
public String createSign(String characterEncoding, SortedMap<String,String> parameters){
 StringBuffer sb = new StringBuffer();
 Set es = parameters.entrySet();
 Iterator it = es.iterator();
 while(it.hasNext()) {
  Map.Entry entry = (Map.Entry)it.next();
  String k = (String)entry.getKey();
  Object v = entry.getValue();
  if(null != v && !"".equals(v)
   && !"sign".equals(k) && !"key".equals(k)) {
   sb.append(k + "=" + v + "&");
  }
 }
 sb.append("key=" + weChatConfig.getWxApiKey());//最后加密时添加商户密钥，由于key值放在最后，所以不用添加到SortMap里面去，单独处理，编码方式采用UTF-8
 String sign = MD5Util.MD5Encode(sb.toString(), characterEncoding).toUpperCase();
 return sign;
}


//将封装好的参数转换成

public String getRequest
 StringBuffer sb = new StringBuffer();
 sb.append("<
 Set es = parameters.entrySet();
 Iterator it = es.iterator();
 while(it.hasNext()) {
  Map.Entry entry = (Map.Entry)it.next();
  String k = (String)entry.getKey();
  String v = (String)entry.getValue();
  if("sign".equalsIgnoreCase(k)){

  }
  else if ("attach".equalsIgnoreCase(k)||"body".equalsIgnoreCase(k)) {
   sb.append("<"+k+">"+"<![CDATA["+v+"]]></"+k+">");
  }
  else {
   sb.append("<"+k+">"+v+"</"+k+">");
  }
 }
 sb.append("<"+"sign"+">"+"<![CDATA["+parameters.get("sign")+"]]></"+"sign"+">");
 sb.append("</
 return sb.toString();
}

/**
 * 解析
 * @param str
 * @return
 * @throws JDOMException
 * @throws IOException
 */
public Map do
 str

 if(null == str
  return null;
 }

 Map m = new HashMap();

 InputStream in = new ByteArrayInputStream(str
 SAXBuilder builder = new SAXBuilder();
 Document doc = builder.build(in);
 Element root = doc.getRootElement();
 List list = root.getChildren();
 Iterator it = list.iterator();
 while(it.hasNext()) {
  Element e = (Element) it.next();
  String k = e.getName();
  String v = "";
  List children = e.getChildren();
  if(children.isEmpty()) {
   v = e.getTextNormalize();
  } else {
   v = getChildrenText(children);
  }

  m.put(k, v);
 }

 //关闭流
 in.close();

 return m;
}
/**
 * 获取子结点的
 * @param children
 * @return String
 */
public String getChildrenText(List children) {
 StringBuffer sb = new StringBuffer();
 if(!children.isEmpty()) {
  Iterator it = children.iterator();
  while(it.hasNext()) {
   Element e = (Element) it.next();
   String name = e.getName();
   String value = e.getTextNormalize();
   List list = e.getChildren();
   sb.append("<" + name + ">");
   if(!list.isEmpty()) {
   sb.append(getChildrenText(list));
   }
   sb.append(value);
   sb.append("</" + name + ">");
  }
 }

 return sb.toString();
}
 
public class MD5Util {
 private static String byteArrayToHexString(byte b[]) {
  StringBuffer resultSb = new StringBuffer();
  for (int i = 0; i < b.length; i++)
   resultSb.append(byteToHexString(b[i]));

  return resultSb.toString();
 }

 private static String byteToHexString(byte b) {
  int n = b;
  if (n < 0)
   n += 256;
  int d1 = n / 16;
  int d2 = n % 16;
  return hexDigits[d1] + hexDigits[d2];
 }

 public static String MD5Encode(String origin, String charsetname) {
  String resultString = null;
  try {
   resultString = new String(origin);
   MessageDigest md = MessageDigest.getInstance("MD5");
   if (charsetname == null || "".equals(charsetname))
    resultString = byteArrayToHexString(md.digest(resultString
      .getBytes()));
   else
    resultString = byteArrayToHexString(md.digest(resultString
      .getBytes(charsetname)));
  } catch (Exception exception) {
  }
  return resultString;
 }

 private static final String hexDigits[] = { "0", "1", "2", "3", "4", "5",
   "6", "7", "8", "9", "a", "b", "c", "d", "e", "f" };
}
public class CommonUtil {
 public static String httpsRequest(String requestUrl, String requestMethod, String outputStr) {
  try {
   URL url = new URL(requestUrl);
   HttpsURLConnection conn = (HttpsURLConnection) url.openConnection();
   conn.setDoOutput(true);
   conn.setDoInput(true);
   conn.setUseCaches(false);
   // 设置请求方式（GET/POST）
   conn.setRequestMethod(requestMethod);
   conn.setRequestProperty("content-type", "application/x-www-form-urlencoded");
   // 当outputStr不为null时向输出流写数据
   if (null != outputStr) {
   OutputStream outputStream = conn.getOutputStream();
   // 注意编码格式
   outputStream.write(outputStr.getBytes("UTF-8"));
   outputStream.close();
   }
   // 从输入流读取返回内容
   InputStream inputStream = conn.getInputStream();
   InputStreamReader inputStreamReader = new InputStreamReader(inputStream, "utf-8");
   BufferedReader bufferedReader = new BufferedReader(inputStreamReader);
   String str = null;
   StringBuffer buffer = new StringBuffer();
   while ((str = bufferedReader.readLine()) != null) {
   buffer.append(str);
   }
   // 释放资源
   bufferedReader.close();
   inputStreamReader.close();
   inputStream.close();
   inputStream = null;
   conn.disconnect();
   return buffer.toString();
  } catch (Exception e) {
   e.printStackTrace();
  }
  return null;
 }

 public String httpRequest(String urlStr, String 
  StringBuilder sb = new StringBuilder();
  try {
   URL url = new URL(urlStr);
   URLConnection con = url.openConnection();
   con.setDoOutput(true);
   con.setRequestProperty("Pragma", "no-cache");// 【Pragma:】centos7报错,不合法
   con.setRequestProperty("Cache-Control", "no-cache");
   con.setRequestProperty("Content-Type", "text/
   OutputStreamWriter out = new OutputStreamWriter(con.getOutputStream());
   out.write(new String(
   out.flush();
   out.close();
   BufferedReader br = new BufferedReader(new InputStreamReader(con.getInputStream()));
   String line = "";
   for (line = br.readLine(); line != null; line = br.readLine()) {
   sb.append(line);
   }
  } catch (MalformedURLException e) {
   e.printStackTrace();
  } catch (IOException e) {
   e.printStackTrace();
  }
  return new String(sb.toString().getBytes(), "UTF-8");
 }

}







 
 
 

   
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直接上代码Stringnonce_str=WXPayUtil.generateNonceStr();//WXPayUtil微信自己有的,自己下载,这里是生成随机字符串,下载地址(下载java的里面就有):https://pay.weixin.qq.com/wiki/doc/api/native_sl.php?chapter=11_1SortedMap<String,String>sig
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